Which statement describes all primary producers? a. all make energy-rich compounds that can be used by other organisms. b. all make their own food using the energy of compounds in the environment. c. all take in energy-rich compounds that were made by other organisms. d. all make their own food using the energy of sunlight.

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

do you have a picture?

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.